Hitachi NV 65AH User guide
MODEL NV 65AH
1. DISASSEMBLY AND REASSEMBLY
The items particularly necessary for disassembly and reassembly are described below. The
numbers in the descriptions below correspond to the item numbers in the Parts List and exploded assembly
diagram.
[CAUTION]
Before disassembly or reassembly , be sure to di sconnect the ai r hose from the nai ler (with your
z#
finger released from the trigger) to exhaust all the compressed air and remove all nails.
1-1. General Precautions in Disassembly and Reassembly
z#
Apply grease (Nippeco SEP-3A, Code No.930035) to the o-rings and o-rings’ sliding portion. When
installing the o-rings, be careful not to damage the o-rings and prevent dirt entry.
z#
Oil required: Hitachi pneumatic tool lubricant
1 oz (30 cc) Oil feeder (Code No.877153)
4 oz (120 cc) Oil feeder (Code No.874042)
1 quart (1ltr) Can (Code No.876212)
z#
If the Gasket
z#
Be especially careful to prevent the entry of foreign part icles into the control valve section.
z#
Tightening torque for each part
[6]
is damaged, replace it and check that no air is leaking.
[Bold]
Bolt, screw and cap
Nylock High Tension Bolt M6
Hex. Socket Hd. Bolt M6
Hex. Socket Hd. Bolt M5
Nylock Hex. Socket Hd. Bolt M4
Hex. Socket Hd. Bolt M4
Machine Screw M5
Machine Screw M4
Cap
[30]
[1], [43]
[4]
[102]
[90]
[44]
[87]
[49]
Tightening torque
[N·m (kgf·cm, ft-lbs)]
16.2±1.5 (165±15, 11.9±1.1)
12.7±0.8 (130±8, 9.4±0.6)
8.3±0.5 (85±5, 6.1±0.4)
4.4±0.3 (45±3, 3.2±0.2)
4.4±0.3 (45±3, 3.2±0.2)
2.0±0.5 (20±5, 1.5±0.4)
0.5 - 1.0 (5 - 10, 0.36 - 0.72)
24.5±4.9 (250±50, 18±3.6)
−
−
1
2-2. Disassembly and Reassembly of the Output Section
(1) Disassembly and reassembly of the Exhaust Cover
(A)
, etc. (See Fig. 12A and Fig. 12B)
[7]
Hex. Socket Hd. Bolt
M6 x 16
Top Cover
Plate
[1]
[2]
[3]
Hex. Socket Hd. Bolt
M5 x 35
[4]
[Tools required]
Hex. bar wrench (5 mm and 4 mm)
z#
Hammer
z#
(a) Disassembly
Remove the four Hex. Socket Hd. Bolts M5 x 35
z#
a hex. bar wrench (4 mm). The entire Exhaust Cove r
can now be removed from the Body Ass’y
Remove the Hex. Socket Hd. Bolt M6 x 16
z#
bar wrench (5 mm). The Plate
Exhaust Cover
Gasket
[5]
[6]
now be removed.
As shown in Fig. 12B, insert a 4 to 5 mm (0.157″ to
z#
0.197″) dia. bar into the M6 screw hole in the Exhaust
Cover
Exhaust Valve
Rubber (A)
[7]
with a hammer. Now, the parts forming the Exhaust
Cover
[CAUTION]
Do not use a pointed bar or a bar with a diameter of
Head Valve Spring
[8]
less than 4 mm (0.157
Valve Rubber (A) [ 7] .
the Head Valve
[5],
the Exhaust Valve Rubber
[10],
[23]
[1]
and Top Cover
[2]
and force out Exhaust Valve Rubber (A)
[5]
can be taken out.
[5]
″″″″
) to prevent damage to Exhaust
with
[4]
[5]
.
with a hex.
can
[3]
[7]
O-Ring (S-34)
Head Valve
[9]
[10]
Cylinder O-Ring (C)
(I.D 44.7)
[11]
Head Valve
Rubber
Body Ass’y
[12]
[23]
Fig. 12A Disassembly and reassembly of the
exhaust cover, head valve, exhust v al ve
rubber (A), etc.
Hammer
Exhaust Cover
Exhaust
Valve
Rubber
(A)
[7]
[5]
Fig. 12B
Force out
4 to 5 mm dia. bar
(0.157″to 0.197″)
− 2 −
Exhaust Valve Rubber (A)
Head Valve
[10]
Exhaust
Cover
Charge with 3
grams of grease.
[5]
Push in until the rubber is fully
seated over the projection.
Fig. 13
[7]
Push in
(b) Reassembly
Disassembly procedures should be followed in the
reverse order. Note the following points:
Lubricate the sliding portion of the Head Valve
z#
the Exhaust Cover
with about 3 grams of grease and
[5]
apply grease to each surface of the O-Ring
As shown in Fig. 13, firmly push in Exhaust Valve
z#
Rubber (A)
of the Exhaust Cover
until it is fully seated over the projection
[7]
.
[5]
[10]
[9] [11]
in
.
(2) Disassembly and reassembly of the Cylinder
(See Fig. 14)
O-Ring (I.D 34.2)
Retaining Ring
Cylinder Plate
Piston Ring
Piston
[20]
[13]
[14]
[18]
[9]
Cylinder O-ring
(I.D 63.1)
[15]
Cylinder O-ring (C)
(I.D 44.7)
O-ring (P-46)
[11]
Cylinder
Concave
[16]
[17]
Retaining ring
detaching groove
Piston Bumper
When assembling,
push in the Cylinder
Plate
[14]
Retaining Ring
is surely seated in
the groove in the
Body Ass’y
Body Ass’y
[26]
until the
[13]
.
[23]
[23]
Fig.14 Disassemblyandreassemblyofthe
Cylinder, Piston, Pistonbumper, etc.
, the Piston
[17]
, the Piston Bumper
[20]
[26]
[Tools required]
Hex. bar wrench (4 mm)
z#
Flatblade head screwdriver
z#
(a) Disassembly
Remove the Exhaust Cover
z#
as described in
[5]
section (1), remove the Retaining Ring
Body Ass’y
, insert the blade of the screwdriver
[23]
into the retaining ring detaching groove in the Body
Ass’y
Now, the Cylinder
Piston
, and remove the Retaining Ring
[23]
, the Cylinder Plate
[17]
, the Piston Bumper
[20]
[26]
, etc. can be
taken out.
(b) Reassembly
Disassembly procedures should be followed in the
reverse order. Note the following points:
Apply the supplied oil (Hitachi pneumatic tool
z#
lubricant) to the Piston Ring
34.2)
[17]
Apply grease to the Cylinder O-Ring (I.D 63.1)
z#
, and the internal side of the Cylinder
[19]
.
the Cylinder O-Ring (C) (I.D 44.7)
Facing the concave side of the Cylinder Plate
z#
upward, fit and push the Cylinder
Ass’y
until the Retaining Ring
[23]
, the O-Rinq (I.D
[18]
[11]
[17]
[13]
seated in the groove of the Body Ass’y.
Remember that when putting the Retaining Ring
z#
into the groove of the Body Ass’y
[13]
opening of the Retaining Ring
must not overlap
[13]
with the retaining ring detaching groove.
, etc.
in the
[13]
.
[13]
, the
[14]
[15]
and install.
[14]
in the Body
is correctly
, the
[23]
,
− 3 −
1-3.Disassembly and Reassembly of the Control Valve Section
(See Fig. 15)
Retaining Ring (E-type)
for D6 Shaft
Body Ass’y
[21]
[23]
Head Valve O-ring
(I.D 16.8)
[55]
Valve Bushing (B)
O-ring (S-18)
O-ring (I.D 8.8)
O-ring (I.D 11)
O-ring (S-4)
Valve Piston (B)
Plunger Spring
Plunger (A)
O-ring (I.D l.8)
[56]
[57]
[58]
[59]
[60]
[61]
[62]
[63]
[64]
Roll Pin
D3 x 28
Trigger (A)
Trigger Pin
[Tools required]
Flatblade head screwdriver
z#
Roll pin puller (3 mm dia.)
z#
[51]
Hex. bar wrench (4 mm)
z#
[52]
[53]
(a) Disassembly
Remove the Retaining Ring (E-Type) for D6 Shaft
z#
with the blade of a screw driver and remove
[21]
the Triqger Pin
, and Trigger (A)
[53]
removed.
To remove Trigger (A)
z#
driving Section (Pushing Lever (B)
,etc.), remove Trigger (A)
[29]
down Plunger (A)
[63]
together with the
[52]
[37]
while forcing
[52]
with the blade of a
screwdriver, as shown in Fig. 16.
can be
[52]
, the Nose
Valve Bushing (A)
[65]
Fig. 15 Disassembly and reassembly of the
control valve section
Remove
Trigger (A)
[52]
Force down
Screwdriver
Push Lever (B)
Plunger (A)
[37]
[63]
Fig. 16
− 4 −
Body Ass’y
[23]
Push
Head Valve O-Ring
(I.D 16.8)
[55]
Valve Bushing
(B)
[56]
Valve Piston (B)
Valve Bushing (A)
[61]
[65]
Pull out the Roll Pin D3 x 28
z#
with the roll
[51]
pin puller (3 mm dia.), and take out the
control valve in the following manner.
1) Remove the Exhaust Cover
[5]
by
following the procedure in (1), section
1-2.
2) As shown in Fig. 17, put a 4 to 5 mm
(0.157 to 0.197″) dia. bar in from the upper
side of the Body Ass’y
top of Valve Piston (B)
and push the
[23]
. Now, the
[61]
parts forming the control valve can be
taken out except Valve Bushing (A)
and the Head Valve O-Ring (I.D 16.8)
.
[55]
[65]
When disassembling,
do not pull out this
part by gripping it
with the pliers.
Wire with 1.5 to 3 mm dia.
(0.059″ to 0.118″)
Fig. 17
Plunger (A)
[63]
Valve Bushing (B)
Hole
Be careful not to
damage the internal
surface.
[56]
[CAUTIONS]
z#
z#Be careful not to damage Valve Pist on ( B)
z#z#
[61], Valve Bushing (A) [65] and (B) [56],
etc.
z#
z#Do not pull out the end of Plunger (A) [63]
z#z#
with pliers.
3) To take out Valve Bushing (B)
[56]
, put a
1.5 to 3 mm (0.059″ to 0.118″) dia. wire
with its end hooked into the hole in the
bushing and pull it out while being careful
not to damage the internal surface of
Valve Bushing (B)
, as shown in
[56]
Fig. 18.
Fig. 18
− 5 −
Loading...